TY - JOUR
T1 - HIGH FREQUENCY SAW FILTERS STRETCHED OVER NON-OVERLAPPED ELECTRODES FOR SATELLITE BROADCAST RECEIVERS.
AU - Yamada, Jun
AU - Yuhara, Akitsuna
AU - Shiba, Takashi
AU - Toyama, Tatsuro
PY - 1985
Y1 - 1985
N2 - The authors have developed a new ultra-high frequency surface acoustic wave (UHF SAW) filter for satellite broadcast receivers. The features are a high center frequency which suppresses image interference, sufficiently flat group delay for linear FM detection, and no necessity to adjust for tuning. The influence of electrode resistance on insertion loss and the triple transit echo caused by surface wave reflection have been analyzed in Smith's (1972) extended equivalent circuit model. This electrode resistance is effectively applied here as an independent design parameter of radiation and load conductance. In consequence, interdigital transducers with wide apertures stretched over the nonoverlapped electrodes have been applied to suppress undesired surface wave diffraction and reflection effects without any increase of insertion loss. These transducers thus eliminate the conventional tuning coils.
AB - The authors have developed a new ultra-high frequency surface acoustic wave (UHF SAW) filter for satellite broadcast receivers. The features are a high center frequency which suppresses image interference, sufficiently flat group delay for linear FM detection, and no necessity to adjust for tuning. The influence of electrode resistance on insertion loss and the triple transit echo caused by surface wave reflection have been analyzed in Smith's (1972) extended equivalent circuit model. This electrode resistance is effectively applied here as an independent design parameter of radiation and load conductance. In consequence, interdigital transducers with wide apertures stretched over the nonoverlapped electrodes have been applied to suppress undesired surface wave diffraction and reflection effects without any increase of insertion loss. These transducers thus eliminate the conventional tuning coils.
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U2 - 10.1109/TCE.1985.290000
DO - 10.1109/TCE.1985.290000
M3 - Article
AN - SCOPUS:84939733548
VL - CE-31
JO - IEEE Transactions on Consumer Electronics
JF - IEEE Transactions on Consumer Electronics
SN - 0098-3063
IS - 4
ER -